[填空题]
A potter’s wheel is rotak nr 2v/gm4snscq2n0ms+3b+ ktdy,tmu+;tel9ken *c- 7w sj9jing around a vertical axis through its center at a frequency of 1.5rev/s The wheel can be considered a uniform disk of mass 5.0 kg and diameter 0.40 m. The potter then throws a 3.1-kg chunk of ct*jny +7k-msce w 9tuldj9 ,e;lay, approximately shaped as a flat disk of radius 8.0 cm, onto the center of the rotating wheel. What is the frequency of the wheel after the clay sticks to it? $rev/s$